Blood serum concentrations are much lowerâonly about 0.4% of the body's potassium is found in blood serum. As noted above, hypokalemia can be caused by the sudden uptake of potassium ions from the bloodstream by muscle or other organs or by an overall depletion of the body's potassium.
Early symptoms of the flu may include conditions such as excessive or sudden fatigue or body aches and chills, according to Healthline. While fatigue can be an early symptom of a cold, in people who have the flu, the fatigue is much worse.
Making the world better, one answer at a time. Symptoms of the flu usually develop suddenly, about three days after being exposed to the virus. They include fever, chills, cough, sore throat, runny nose, and soreness and aching in the back, arms and legs.